Gas Diffusion Laboratory

 

EDUCATION

Ph.D Macromolecular Science and Engineering, September 1999-2004. [PhD Thesis]

Center for Applied Polymer Research (CAPRI)

Case Western Reserve University, Cleveland, OH

Faculty advisors: Professor Anne Hiltner and Professor Eric Baer

Awards:

Finalist: ICI Student Award in Applied Polymer Science (PMSE division, ACS) 2004

Recognition of significant contribution to plastic industry by Society of Plastics Engineers 2003

Runner-up at the 22nd CAPRI Symposium 2003

Case Prime Fellowship: Case School of Engineering 1999-2004

 

B.E. Polymer Chemical Engineering, 1999

College of Polymer Science&Engineering

Sichuan University, Chengdu, China

Awards:

University scholarship, Sichuan University 1996-1999

Rohm and Haas scholarship, Rohm and Haas Company 1999

 

Technical Diploma Applied Computer Science, September 1996-January 1998

Sichuan University, Chengdu, China

 

Chengdu Shishi High School, Chengdu, Sichuan 1992-1995

 

Chengdu No.16 Middle School, Chengdu, Sichuan 1989-1992

Contact information

http://filer.case.edu/lxy18/

 

 

RESEARCH INTERESTS (Graduate Study)

Interface and interphase properties of polymer blends

Mechanisms of gas transport in polymers
Free volume related concepts

Fabricating interphase materials by nanoscale layer multiplication technology

Barrier Plastics (polyesters, polyolefin, etc.)

Structure and gas barrier properties of liquid crystalline polymers
Creative post-processing as a route for innovative materials

Physical properties and structural model of proton exchange membranes (PEM)

 

Research Facilities

 

RECENT PUBLICATIONS

 

25.Forced assembly of polymer nanolayers thinner than the interphase R. Y. F. Liu, A. P. Ranade, H. P. Wang, T. E. Bernal-Lara, A. Hiltner, and E. Baer, Macromolecules 2005, 38, 10721-10727. [PDF]

 

24.Probing nanoscale polymer interactions by forced-assembly Liu RYF, Jin Y, Hiltner A, Baer E, Macromolecular Rapid Communications 2003, 24, 943-948.

[PDF] [Featured as cover story of MRC] [The cover] [Featured in Heart Cut at ACS.org]

23.Oxygen transport as a solid state structure probe for polymeric materials: a review Hiltner A, Liu RYF, Hu YS, Baer E. Journal of Polymer Science Part B-Polymer Physics 2005, 43, 1047-1063.

[Highlight Article] [PDF]

22.Polymer interphase materials by forced-assembly Liu RYF, Bernal-Lara TE, Hiltner A, Baer E, Macromolecules 2005, 38, 4819-4827. [PDF]

21.Improving oxygen barrier properties of poly(ethylene terephthalate) by incorporating isophthalate. I. Effect of orientation Liu RYF, Hu YS, Hibbs MR, Collard DM, Schiraldi DA, Hiltner A, Baer E Journal of Applied Polymer Science 2005, 98(4), 1615-1628. [PDF]

20.Structure and thermal stability of polyethylene nanolayers Bernal-Lara, TE, Liu RYF, Hiltner A, Baer E, Polymer 2005, 46 3043-3055. [PDF]

19.Effect of orientation on free volume and oxygen transport of a polypropylene copolymer Somlai LS, Liu RYF, Landoll LM, Hiltner A, Baer E, Journal of Polymer Science Part B-Polymer Physics 2005, 43, 1230-1243. [PDF]

18.Interphase Materials by Forced-Assembly of Glassy Polymers Liu RYF, Bernal-Lara TE, Hiltner A, Baer E, Macromolecules 2004, 37, 6972-6979. [PDF]

17.Crystallinity and Oxygen Transport Properties of PET Bottle Walls Liu RYF, Hu YS, Schiraldi DA, Hiltner A, Baer E, Journal of Applied Polymer Science 2004, 94, 671-677. [PDF]

16.Interphase Materials by Forced-Assembly of Glassy Polymers Liu RYF, Hiltner A, Baer E, Polymeric Materials: Science and Engineering 2004, 91, 356-358. [PDF]

15.Solid Structure of Copolyesters Containing a Mesogenic Monomer, Hu YS, Liu RYF, Schiraldi DA, Hiltner A, Baer E, Macromolecules 2004, 37, 2128-2135. [PDF]

14.Oxygen Barrier Properties of Copolyesters Containing a Mesogenic Monomer, Hu YS, Liu RYF, Schiraldi DA, Hiltner A, Baer E, Macromolecules 2004, 37, 2136-2143. [PDF]

13.Poly(ethylene terephthalate) Modified with Aromatic Bisester Diamides: Thermal and Oxygen Barrier Properties Hibbs MR, Holtzclaw J, Collard DM, Liu RYF, Hiltner A, Baer E, Schiraldi DA, Journal of Polymer Science Part A-Polymer Chemistry 2004, 42, 1668-1681. [PDF]

12.Polymers with palladium nano-particles as active membrane materials, Yu J, Liu RYF, Poon B, Nazarenko S, Koloski T, Vargo T, Hiltner A, Baer E, Journal of Applied Polymer Science 2004, 92, 749-756. [PDF]

11.Free volume and oxygen transport of cold-drawn polyesters, Liu RYF, Hiltner A, Baer E, J. , Journal of Polymer Science Part B-Polymer Physics 2004, 42, 493-504. [PDF]

10.Barrier properties of polyesters - relationship between diffusion and solid state structure Baer E, Hu YS, Liu RYF, Schiraldi DA, Hiltner A, Polymeric Materials: Science and Engineering 2003, 89, 19-20. [PDF]

9.Comparison of statistical and blocky copolymers of ethylene terephthalate and ethylene 4,4 -bibenzoate based on thermal behavior and oxygen transport properties, Liu RYF, Hu YS, Hibbs MR, Collard DM, Schiraldi DA, Hiltner A, Baer E, Journal of Polymer Science Part B-Polymer Physics 2003, 41, 289-307. [PDF]

8.Effect of cold drawing on oxygen-barrier properties of polyesters, Liu RYF, Hiltner A, Baer E, ANTEC 2003, 3225-3229. [PDF]

7.Oxygen transport and free volume in cold-crystallized and melt-crystallized poly (ethylene naphthalate), Hu YS, Liu RYF, Zhang LQ, Rogunova M, Schiraldi DA, Nazarenko S, Hiltner A, Baer E, Macromolecules 2002, 35, 7326-7337. [PDF]

6.Oxygen-barrier properties of cold-crystallized and melt-crystallized poly (ethylene terephthalate-co-4,4 -bibenzoate), Hu YS, Liu RYF, Rogunova M, Schiraldi DA, Nazarenko S, Hiltner A, Baer E, Journal of Polymer Science Part B-Polymer Physics 2002, 40, 2489-2503. [PDF]

5.Oxygen-barrier properties of cold-drawn polyesters, Liu RYF, Schiraldi DA, Hiltner A, Baer E, Journal of Polymer Science Part B-Polymer Physics 2002, 40, 862-877. [PDF]

4.Polyesteramides as barrier plastics, Hibbs MR, Holtzclaw J, Collard DM, Liu RYF, Hiltner A, Baer E, Schiraldi DA, Polymer Preprints 2002, 43, 1311.

3.Synthesis and properties of montmorillonite/polyimide nanocomposite film, Lei, Yong; Liu, Yu-feng; Jiang, Lu-xia; Fu, Qiang. Fuhe Cailiao Xuebao 2002, 19, 42-45. [PDF]

2.Oxygen-barrier properties of copolymers based on ethylene terephthalate, Polyakova A, Liu RYF, Schiraldi DA, Hiltner A, Baer E, Journal of Polymer Science Part B-Polymer Physics 2001, 39, 1889-1899. [PDF]

1. Research on the synthesis and properties of polyimide/montmorillonite nanocomposites, Yong Lei, Yufeng Liu, Luxia Jiang, Qiang Fu, Insulating Materials 2001, 34, 5-8. [PDF]

 

 

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RECENT PRESENTATIONS


Interphase Materials by Forced-Assembly of Glassy Polymers ACS: ICI Student Award Symposium, Philadelphia PA, August 2004.

 

Probing Interphases of Immiscible Polymer Blends by Forced-Assembly Polymer Processing Society Annual Meeting (PPS-20), Akron OH, June 2004.

 

Interphase Materials by Forced-Assembly of Glassy Polymers the 23rd Annual Symposium of the Center for Applied Polymer Research (CAPRI), Cleveland OH, June 2004.

 

Probing Nanoscale Polymer Interactions by Forced-Assembly, Case Western Reserve Macromolecular Science Colloquia, Cleveland OH, October 2003.

 

Effect of Cold-Drawing on Oxygen-Barrier Properties of Polyesters, Annual Meeting of Society of Plastic Engineers (SPE), Nashville TN, May 2003.


Using Oxygen Transport to Probe the Glassy State, the 21st Annual Symposium of the Center for Applied Polymer Research (CAPRI), Cleveland OH, May 2002.


Probe the Glassy State Using Gas Transport Properties, Case Western Reserve Macromolecular Science Colloquia, Cleveland OH, October 2002.

 

 

Major Accomplishments

Development of a new type of interphase material by forced-assembly using nanoscale layer multiplication technology. An innovative approach opens the door to gain insight into the interphase structure-properties relationships using conventional tools of polymer analysis. Invention of interphase material raises the possibility of new high-performance polymeric materials. (Heart Cut)

Successfully fabricating nanomaterials using layer multiplication technology.

A novel concept of using gas transport (permeability, diffusivity, and solubility) as a sensitive probe to polymeric structures. It has been shown that free volume related concepts can be systematically investigated.

-Quantifying the excess free volume;

-Probing the equilibrium glassy state;

-Densification in the amorphous state;

-Constrained and dedensified amorphous packing in semi-crystalline polymers;

-Free volume structure in liquid crystalline polymers;

-Gas diffusion mechanism in the glassy state.

Understanding the key variables that control oxygen transport through polymers facilitates better design of barrier plastics for packaging applications.

Development and understanding of a new class of reactive polymer/nanoparticle composite membranes for high-efficiency gas separation applications.

Polyimide nanocomposites.

 

MEMBERSHIP

Member of American Chemical Society (ACS)

 

刘宇锋

http://filer.case.edu/lxy18/

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